After recapping & whatnot, the electronics are working pretty well on my Emerson 609. The optical (Norelco Protelgram) portion . . . not so wonderful.
Apart from issues like bad horizontal linearity, which is only an adjustment, the image is not only dim, but unable to focus despite fiddling with the electronic and mechanical focus adjusters.
The 45-degree mirror in the optics box appears to be in bad shape:
Is this the mirror that people send out to be resilvered? If so, where?
I haven't made any attempt to clean it, having read horror stories in the past about people who destroyed projection TV components by inappropriate cleaning.
Phil Nelson
Phil's Old Radios
http://antiqueradio.org/index.html